Transmission-shifting mechanism



'BJC. ZUHARS AND H. D. CLARKE.

TRNSMI APPLICATION FILED IAN.' 21.

SSION SHIFTING MECHANISM..

|920- RENEWE AUG. 20. 1921.

dll I B. C. ZUHARSAND H. D. CLARKE. TRANSMISSION SHIFTING MECHANISM.

. 1920. nENEwED Aue. 2o. |921.

. Patented Sept. 5,1922.r

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APPLICATION FILED .IAN.2I

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B. c. zuHAf'as AND H. D. CLARKE. TRAN'sMlssfoN'SHIFTINQMEcaANsrvLAPPucAT'loN vmsu IAN-.21. 1920. nENEwED A-us. 2o. 1921.

1,427,994,- Patented Sept. 5, 1922.

3 SHEETS-SHEET 3.

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fgatented Sept, 5, i922@ rarer eric,

BENJAMIN C. ZUHARS AND HARRY D. CLARKE, OF COLUMBUS, OHIO, ASSGNORS TOTHE OHIO TRACTOR GOMEANZ, OF CQIAUMBUS, 02H10, A CORPORATION OE OHIO.k i

TRANSMISSION-summiere MEGHANISM.

Appncanon inea ranuaryei, 192e, semaine. 353,043. Renewed august au,1921. seriaino. 493,922.

To all whom t may concern.' y

Be 1t known that we, BENJAMIN C. Zur-Inns and HARRY Don CLARKE, citizensof they United States, residing at Grand View 5 Heights, Columbus, inthecounty of Franklin and State of 0hio, have invented certain new anduseful lmprovements inTransniission-Shifting Mechanisms; and we dohereby declare the following tobe a full, clear, and

exact description of' the inventiomsuch as will enableothers skilled inthe art to. which it appertains to make and use the same. i Thisinvention relates to` new and useful improvements in transmissionshifting mechanisms and has `for its primary object the provision oflmeans which permits theconfp,

trol lever to be located rearwardly ofthe transmission and differentialof a motor vehicle or tractor and in convenient reach of the operatorseated on the rear end of the tractor or vehicle.

, Another object of this invention is the provision of means whichpermits a great proportion of the shifting rods of the transmission tobehoused and protected by the differential housing of the tractor orvehicle.

A furtherobject of this 'invention is the provision of means forsiuaporting the for ward endsof the shifting rods and forks thereofandis fastenedonto the transmission housing which provides a neat, compactand convenient arrangement of parts.

, A still further object` of this invention is the provision of atransmission k,shifting mechanism of the above stated character,y

which sha-ll be simple, durable and efficient, and which may bemanufactured and sold at a comparatively low cost.

An vessential feature of the invention is the employment. of a' singlecontrolling lever so associated with the transmission mechanism that byone movement thereof a direct connection at intermediate speed will bemade, n

while for high speed through thecountershaft. the opposite movement ofthe control-y ling lever will be made andfor other speeds a connectionwill be made through the counter-shaft by a movement ofthe control thatwill become associated in the mindiof the operatorwith thesespeeds@ lThis arrangement enables the operator iny the easiest and mostnatural-way-toimanipulate the control for all normal operations of thetractor, so as-to start at intermediate speed by a directconnectionofthe driven l shifting mechanism, i

and driving shafts, and therebyminimize the movements of the control andalso elim-k high speed gear, so thata single gear mayV be shifted fromintermediate direct drive to the highspeed, and formost normal oper-kations such asplowingmthe operator will startjat "intermediate andcontinue at that speed, though for transporting purposes he maythrow thegear to the high speed. i

With these andr other objects kkin view as will become more apparentyasv7 the description proceeds, the inventionl consists sin certainnovel; features off construction, combination,vfand arrangement of partsas will be hereinafter moreV fully described and claimed.y y

For .ak complete vention, reference isto be had to the followingdescription, and accompanying drawings, in which y, f Figure l is avertical sectional view, illustrating ra transmission yshiftingymechanism constructed in accordance withour inven-L llOIl, n y j iFigure 2 is a fragmentary sectional view of the transmission whichr isactuated by our Figure is a, fragmentary sectional view illustrating theconnectionbetween the shiftingy rods fand the shifting' gears yofthetransmission,` l i Figure t Ais arear elevation of a support ing casing,E, i Figure 5 is an end elevation of the same,

Figure'l is plan view illustrating one of.

the shifting forks, 'K

Figure is a detail sectional view of one of the shifting forksillustrating avspring pressed plunger, y p z ,A n

Figure-8 isaffragmentary planview illustratingI a bracket-,forysupporting lthe rear ends ofthe shifting rods.. i d

Referring in detail to the drawings, the numeral l indicates adifferential housingv and 2 a transmission `housing'secured to saiddifferential housing ,and which housing forms subject matter for aJo-,pending applicatiomSerial Number 356,746,1now Pat' ent No.1,860,857. A transmission 3 is located withinfthe transmissionghousing 2and understanding of our in longitudinal forms the subject matter ofanother copending application, Serial Number 563,311, and includes apower shaft 4, a driven shaft 5 and a counter shaft G. The driven shaft5 is connected to the counter shaft 6 by gears 7 and S which arecontinuously in mesh with each other. A. shifting gear 9 is splined tothe drive shaft l and is provided with internal and external teeth andthe. internal teeth are adapted to mesh with the teeth of the gear 'Twhen the shifting gear 9 is in one position for the purpose of obtainingdirect drive betvreen the drive shaft 4t and the driven shaft 5. A gear10 is secured to the counter shaft G and is adapted to be driven by theshifting gear 9 when in another position to obtain another speed to thedriven shaft 5 from the drive s Aaft t. Spaced speed changing' gears 11and 12 are secured to the counter shaft and a speed changing gear 13 issplined to the drive shaft @and is continuously in mesh with an idlegear le journaled on the counter shaft 6 and is disposed between thespeed changing gears 11 and 12 and is of a width greater than said gears11 and 12. The idle gear 1% is continuously driven the shifting gear 13and is adapted to drive a power take-off mechanism 15 which formssubject matter for another copending application.

The `gear 12 is continuously in mesh with a reversing gear or pinion 16journaled on a stub shaft 17 and on moving the shifting gear 13 in onedirection, it will mesh with the reverse pinion or gear 1G to. give areverse drive to the transmission. By shifting the gear 13 in anopposite direction, the same is moved into mesh with the gear 11 givinganother speed to the transmission in a forward direction over thatheretofore referred to.

The shifting gears 9 and 13 are provided with grooved collars 18 toreceive the bifurcated ends 19 of'shifting forks 20 which extend throughan opening 21 formed in the side of the transmission casing 2. Theopening 21 is closed by a cover 22 in the form of a fran e 23 which, isbolted or otherwise sev, cured to the transmission housing and is closedby a front wall 2li. Supporting rods 25 are secured in the frame 22 andextend through openings 2G formed in the ends of the shifting forks 20.Lateral extensions 27 are formed on the ends of the shifting forks andyare provided with openings 28 to receive the forward ends of shiftingrods 29. r1`he shifting rods 29 are secured to the extensions 27 by nuts30. The shifting rods 29 extend rearwardly and pass into and through thedifferential housing 1 as clearlykshown in Figure 1 and are slidablysupported adjacenttheir rear ends by a bracket 31.

Blocks 33 are secured tothe rear ends of y the Shifting rods 29: and arelocated in an auxiliar-y housing 34 which is formed integrally with thedifferential housing 1, and each block 33 is provide/l with a notch 35.A. division plate 36 is located in the auxiliary housing 3e and isdisposed between the blocks 353 and is provided with a notch 37 whichnormally receives the inner end of a shifting lever 33 land also permitsthe inner end of this shifting lever to be moved into the notches ofsaid bloclrs 33 for connecting said levers to either of the shiftingrods 29 providing a construction wherein either of the shifting gears 13or 9 can be moved forwardly and rearwardly to obtain the various speedsto the transmission 3. A soclfeted member 39 is carried by the auxiliaryhousing 3a and receives a ball 49 on the shifting lever 3 so that saidshifting lever can be rocked for moving its inner end into engagementwith either ofthe notches 35 of the blocls or in the notch 37 of thedivision plate 36 which is the neutral position of the shifting lever.

Spring actuated plungers L1-1 are seated in casings 42 formed integrallywith the shifting forks and said plungers are adapted to engage insoaced grooves 13 formedin the supporting rods 25 for'the purpose ofholding the shifting gears 13 and 9 in their various positions. rheshifting gears each have three positions, two of said positions are gearmeshing positions and the other position is neutral and the supportingrods 25 are provided with a corresponding number of grooves so that theshifting gears are held in their various positions when the plungersengage the grooves of the supporting rods 25.

From the foregoing description taken in connection with the accompanyingdrawings, it will be noted that ashifting mechanism for a transmissionhas been provided which can be easily and conveniently installed on atransmission and wherein the shifting rods of said mechanism aresubstantially housed within the differential housing of the tractor orvehicle to protect them from injury and also provides 'a constructionwherein the shifting lever can be located rearwardly of the differentialhousing and in convenient reach ofan operator positioned on the rear endof the tractor or motor vehicle.

lihile we have shown and described the preferred embodiment of ourinvention, it

will be understood that minor changes in` construction, combination, andarrangement of parts may made without departing from the spirit andscope of the invention as claimed.

Having thus described our invention, what we claim is 1. A transmissionshifting mechanism including a transmission housing with transmissionshifting gears ofa differential housing extending rearwardly of thetransmission housing, control means carried by the differential housing,and means connecting said control means to the shifting gears.`

2. A transmission shifting mechanism including a transmission housingwith a transmission shifting gear and a differential housing extendingrearwardly of the transmission housing, an auxiliary housing carriedmission housing, an auxiliary housing at thek rear of the dierentialhousing, shiftingrods extending from the auxiliary housing to thetransmission housing and through the differential housing, control meansfor said shifting rods, and means connecting the shifting rods to theshifting gears.

4. A transmission shifting mechanism including a transmission housingwithtransmission shifting gears and a differential housing extendingrearwardly of the trans mission housing, a control element carried bythe rear portion of the differential house ing, shifting rods connectedto the control element and extending through ythe differential housingto the transmission housing, and forks secured to the shifting rods andto the shifting gears. Y

5. A transmission shifting mechanism including a transmission housingwith `transmission shifting gears and a differential housing extendingrearwardly of the trans-` mission housing, a controlelement carried bythe rear portion of the differential housf ing, shifting rods slidablymounted in the differential housing and having connection with thecontrol elem-ent and extending forwardly to the transmission housing, aframe carried by the transmission housing, and forks slidable in saidframe yand connected to the shifting gears and to the shifting rods. f

6. A transmission shifting mechanism including a transmission housinghaving a slot and transmission shifting gears 'therein and adifferential housingextending rearwardly of th-e transmissiony housino'a con-y trol element carried by the rear ptdition of the differentialhousing, shifting rods slidably mounted in the dierential housing andconnected to the control element` and extending forwardly through thedifferential f housing tothe opening in thetransmission housing, acasing secured to the transmission housing and closing the openingthereof and slidably receiving the forward ends `of the shifting rods,supporting shafts carried by said casing and having spaced grooves,forks connected to the shifting gears and slidable on said supportingshafts and connectedto th-e forward ends lof the shifting rods, andkspring pressed plungers carried by the forks and adapted to engage thegrooves. n n

In testimony whereof we affix our signatures 1n presence of twowitnesses.

BENJAMIN C. ZUHARSV. HARRY DCLARKE.

` `Witnesses: 'I i WILLIAM F. GARRETT, JAMESKF. LANGHEAD.

